EP1409233B1 - Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens - Google Patents

Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens Download PDF

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Publication number
EP1409233B1
EP1409233B1 EP02748672A EP02748672A EP1409233B1 EP 1409233 B1 EP1409233 B1 EP 1409233B1 EP 02748672 A EP02748672 A EP 02748672A EP 02748672 A EP02748672 A EP 02748672A EP 1409233 B1 EP1409233 B1 EP 1409233B1
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EP
European Patent Office
Prior art keywords
tyre
crown
volume
moulding
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP02748672A
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English (en)
French (fr)
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EP1409233A2 (de
Inventor
Federico Mancosu
Anna Paola Fioravanti
Pierangelo Misani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pirelli and C SpA
Pirelli Tyre SpA
Original Assignee
Pirelli Pneumatici SpA
Pirelli SpA
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Priority to EP02748672A priority Critical patent/EP1409233B1/de
Publication of EP1409233A2 publication Critical patent/EP1409233A2/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/102—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using rigid mould parts specially adapted for moulding articles having an axis of symmetry
    • B29C43/104—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using rigid mould parts specially adapted for moulding articles having an axis of symmetry the mould cavity lying totally outside the axis of symmetry, e.g. toroidal moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof

Definitions

  • the present invention relates to a device and a method for moulding and wlcanizing a tyre, said moulding and vulcanizing operations being carried out at controlled volume.
  • tyre manufacture involves the preparation, on a drum, of a green product consisting of a toroidal sleeve comprising a carcass that has a crown zone inserted between a pair of axially-opposed sidewalls, ending in beads for anchoring the tyre to a corresponding assembling rim, a belt structure and a tread band.
  • the carcass and the belt structure are formed from preselected elastomeric materials and reinforcing elements, the tread band and the sidewalls are formed from strips of elastomeric material.
  • the green tyre is extracted from the drum and submitted to vulcanization in a mould, under the combined action of heat and pressure.
  • the vulcanizing mould comprises a crown of radially adjustable sectors, interposed between two axially-opposed, mirror-finish cheeks, and an inflatable internal elastic chamber.
  • the green tyre is heated simultaneously from the outside and from the inside by means of a fluid under pressure (typically steam or hot water) circulating in the mould and introduced into the internal elastic chamber.
  • a fluid under pressure typically steam or hot water
  • the cheeks are axially brought closer each other and the sectors are moved centripetally, to generate an outwardly closed cavity.
  • the elastic chamber expands and compresses the tyre from the inside against the mould. The tyre thus acquires the final tread pattern and the final shape.
  • any variations of volume and/or of thickness of the green tyre can be tolerated because the internal elastic chamber, being deformable, automatically adapts itself to said variations and can "make adjustments" for them.
  • a tyre moulding and vulcanization technique with a constant-volume mould.
  • This consists of placing a predetermined volume of reinforcing elements and elastomeric material, which constitute the green tyre that is to be built and vulcanized, onto a rigid support of a toroidal shape (with outside surface matched to the inside surface of the finished tyre).
  • the vulcanizing mould has an outer shell formed of a crown of sectors and of cheeks, and an inner part formed of the rigid support carrying the green tyre. When the mould is closed, the outer part of the mould is in its stop position and between said position and the rigid support there is the formation of a hollow space whose volume always remains constant.
  • the green tyre that is to be moulded and vulcanized in said mould must have a similar shape to that of the hollow space and a volume substantially equal to said constant volume of the hollow space of the mould because the moulding pressure depends on the difference between the volume of the green tyre and the volume of the hollow space. If the volume of the green tyre is less than that of the hollow space, the value of the moulding pressure is insufficient and hence the final result is unsatisfactory. On the other hand, in the case of excessive volume of the green tyre (in view of the constant volume available inside the mould and of the incompressibility of the rubber), high pressures are generated inside the mould.
  • Said high pressures can generate excessive stresses on the mechanical components of the mould and lead to the deformation of the mould and hence to the production of a "distorted" product, or to the formation of unacceptable fins, if the elastomeric material flows into the clearances between said mechanical components and/or into suitable vents provided in the mould, or even to mould breakage.
  • the volume of the green tyre should be substantially equal to the free volume of the closed mould.
  • the volume of the green tyre must be just slightly greater than that of the hollow space in which it is accommodated.
  • EP-A-0 264 600 describes a method and an equipment for moulding and vulcanizing a pneumatic tyre, at constant volume, in which elastomeric products and reinforcing elements are placed, in succession, on a rigid support, so that a green tyre is built up progressively.
  • Placing of the elastomeric products is effected by means of at least one volumetric extruder having a discharge orifice positioned, relative to the support, in a plane in which the elastomeric product is applied for making the green tyre.
  • the quantity of elastomeric product deposited is controlled by extruding a given volume from the volumetric extruder in relation to the speed of rotation of the support and to the deposition radius.
  • the profile of the elastomeric product to be produced is obtained by means of a substantially meridian movement of the orifice relative to the rotating deposition surface.
  • the method and the equipment described in this document employ a mould in which the inside is constituted of a rigid support on which the green tyre is built. Thus, it is a constant-volume mould.
  • the method and the equipment described in the above-mentioned document require a green tyre that is to be moulded and vulcanized with a volume as constant as possible, and as close as possible to the theoretical (nominal) volume of the hollow space of the closed mould.
  • volume of the delivered material may depend, as well as on purely mechanical causes, also on the various characteristics of the elastomeric material and/or of the additives from one supplier to another or from batch to batch and/or on the process for mixing the components of the elastomeric compouds.
  • EP-A-0 400 496 describes a volumetric pump for the delivery of green rubber for anapparatus for moulding and vulcanizing a tyre, at constant volume.
  • the pump comprises at least one delivery piston sliding in a cylinder with alternating motion between a top dead point and a bottom dead point.
  • the pump also comprises a feed chamber, means for forced feed for feeding said cylinder and a discharge opening provided with a
  • US 1, 366,750 is related to cores used in the manufacture tyre casing, and more particularly to a core having resilient quality.
  • a core member is provided in sections. Each section comprises three parts adapted when combined to form a body portion upon which the tyre casing is to be formed. One or two parts of each section are formed of spring metal to supply the proper resiliency.
  • US 1,393,998 is related to a manufacture of tyres.
  • casing for pneumatic tyres it is necessary that the casing be under pressure during vulcanisation.
  • a method and an apparatus for manufacturing tyres are provided, an internal fluid pressure, preferably air pressure, is employed without the use of an internal container or air-bag, thus producing tyres eliminating a large item of cost.
  • GB 121,439 is related to a method and an apparatus for manufacturing tyre casings wherein is employed fluid pressure applied indirectly to the interior of the casing through the medium of an elastic wall for bringing the casing to substantial tyre formation, and wherein is subsequently employed fluid pressure applied directly to the interior for giving complete formation to the casing and for supporting the casing during vulcanisation.
  • US 1,328,676 is related to a method and means for manufacturing pneumatic tyres.
  • the tyre carcass is initially formed with its final interior dimension except that what corresponds approximately to the tread area is flattened, that is, not rounded into final interior shape; and finally subjecting said flattened portion to a stretching operation, coextensive with the flattened portion, with the stretching means limited to a movement necessary to complete the full interior formation and size of the desired tyre. non-return valve.
  • the cylinder wall comprises, as sole communication of the cylinder with the exterior, one or more inlet ports in which the feed chamber ends.
  • the inlet port is arranged axially between the top dead point and the bottom dead point and is closed by the delivery piston during its movement towards the top dead point.
  • the volume extruded in one cycle of the pump depends on the volume swept by the delivery piston between the point at which it closes the inlet port and the top dead point and by the fact that the feeding means and said delivery piston are actuated by
  • the aims of the invention are a device and a method for the moulding and vulcanization of a green tyre that offer the advantages of the constant-volume moulding technique but avoid its drawbacks.
  • controlled volume signifies that the volume of the moulding and vulcanization cavity increases or decreases to fit to the volume of the green tyre contained in said cavity. In that way, the volume of said cavity is always equal to that of the green tyre and this obviates the drawbacks due to the "variations" of the industrial process that were described earlier.
  • the invention relates to a device for the moulding and vulcanization of a tyre according to claim 1.
  • the invention relates to a method for moulding and vulcanizing a tyre according to claim 11.
  • the device and the method of the invention make it possible to adjust the volume of the cavity for moulding and vulcanization to the effective volume of the green tyre, while maintaining the moulding pressure within the useful range of values for moulding as the volume of the green tyre varies within predetermined tolerances of the tyre building process.
  • Said device and method have the advantage of guaranteeing attainment of the minimum moulding pressure, of maintaining said moulding pressure within the useful range of values while avoiding mould deformation or breakage, and of eliminating defects in the finished tyre.
  • a further advantage offered by the device and the method of the invention is the vulcanization without steam, in that mould heating can be provided by the Joule effect by means of special devices that are not described herein as they are well known.
  • Fig. 1 shows a device 10, for controlled-volume moulding and vulcanization, in predetermined conditions of temperature and pressure, of a tyre 5 that is at least partially green.
  • Said device 10 includes:
  • suitable shapes 8 are made, which function both as guide for the elastic means 1, and as lower stop for the crown portion (movable part) 2, for the purpose of protecting said elastic means from excessive strains.
  • the crown portion (movable part) 2 is provided at the ends with stops 6, which slide between the cavities/grooves 12 (see Fig. 2) made between the supporting structure 7 and the base portion 4.
  • the configuration is that shown in Fig. 2, with the elastic means 1 preloaded to an optimum value selected by the designer as a function of the process, and with the stop 6 up against the upper side of cavity 12 which opposes and balances the preload.
  • the crown portion (movable part) 2 can move, adapting the volume of the cavity 18 between the outer shell, composed of the cheeks 11 and of the concave sectors 9, and the internal support 25 of device 10, to the volume of the green tyre (variable within the process tolerance),
  • said elastic means 1 are made up of suitable arrangements of disk springs, preferably having a "softening" characteristic of the type shown in Fig. 4, i.e. with stiffness that decreases as the deflection increases.
  • Fig. 4 as an example, the corresponding values of moulding pressure, obtainable for said configuration and arrangement of disk springs, for a tyre size of 225/50 R16, are shown on the right-hand ordinate.
  • the elastic means 1 are operating in a zone of low stiffness that makes it possible to have small variations in the moulding pressure in relation to yields ⁇ s sufficient to compensate the process tolerance in the volume of the green tyre 5.
  • Said internal toroidal support 25, carrying the crown portions (movable parts) 2, owing to the yielding of the elastic means 1, is suitable to absorb the mass/volume tolerances of the green tyre and so allows its moulding and vulcanization at controlled volume.
  • the moulding pressure can be guaranteed with the simultaneous and parallel action of elastic means 1 and of fluid under pressure delivered during the moulding/vulcanization stage into the hollow space between the crown portion (movable part) 2 and the supporting structure 7.
  • the crown portions (movable parts) 2 of the multiple convex circumferential sectors that make up the internal support 25 are provided with gaskets 150 (see Fig. 5) that can be compressed in the circumferential direction to obviate the problems of co-penetration of solids that would otherwise occur on passing from position 2' to position 2" of the movable crown portion 2 (see Fig. 5).
  • Said gaskets 150 are glued or fixed mechanically to one of the two opposed surfaces of two contiguous crown portions 2.
  • Fig. 6 shows the meridian semi-section of a convex circumferential sector 125 which constitutes a variant of the convex circumferential sector 25 of Fig. 2.
  • the sector 125 includes a base portion 104, radially internal, that is suitable to define the axially internal surface of the sidewalls of said tyre 5, and a cap 120, radially external, suitable to define the radially internal surface of the crown of said tyre 5, said cap 120 including a supporting structure 107 provided with at least one central radial rib 113, and a crown portion (movable part) 102, radially external, movable in both ways in the radial direction relative to said parts 107 and 104, owing to the yielding of the elastic means 101 radially interposed between parts 107 and 102.
  • the supporting structure 107 is made integral with the base portion 104 in just the radial direction, but not in the axial direction, by means of arms 105, which are deformable in bending, joined by screws 103.
  • the deformable arms 105 joining the rib 113 to the cheeks 114 of the base portion 104, allows, by taking advantage of the elasticity of the materials, the relative movement in the axial direction indicated by the double arrow A. Said relative movement allows, if necessary, a compensation of the volume tolerance also on the sidewalls of the tyre: in the case there is an excess of volume in the sidewalls of tyre 5 in the moulding stage, the pressure on the cheeks 114 of the base portion 104 of each drum sector 125 can assume values such as to cause the arms 105 to bend and thus to permit the cheeks 114 to come closer to the equatorial plane of line 115, fitting to the volume of the hollow space between the outer annular cheeks 11 (a and b) and the inner cheeks 114 to the volume of the sidewalls of the green tyre 5.
  • the rib 113 and the base portion 104 can be joined by an "air spring", not shown/described as it is well known, that operates in the direction of the double arrow A and that can be calibrated so as to guarantee the nominal moulding pressure in case of either shortage or excess of volume of the sidewalls of tyre 5.
  • the crown portion 102 is provided with a stop 106, which by engaging with the appropriate profile 112 of the base portion, counteracts the preload of the elastic means 101.
  • Profiles 108 which act both as a guide for the elastic means 101, and as lower stop for the crown portion (movable part) 102, for the purpose of protecting said elastic means from excessive strains, are made in the supporting structure 107.
  • the convex circumferential sector 125 works in a manner similar to sector 25 of Figs. 2-3.
  • said crown portion (movable part) 102 moves owing to the yielding of said elastic means 101, adapting the volume of the hollow space between the internal support 125 and the external shell, made up of said cheeks 11 and said concave sectors 9, to the volume of the green tyre 5 (variable within the process tolerance),
  • Fig. 7 shows the meridian semi-section of a convex circumferential sector 225 that constitutes a further embodiment of the convex circumferential sector 25 of Fig. 2.
  • Sector 225 includes a base portion 204, suitable to define the axially internal surface of the sidewalls of said tyre 5, and a cap 220, radially external, suitable to define the radially internal surface of the crown of said tyre 5, said cap 220 including a supporting structure 207 provided with at least one central radial rib 213, and a crown portion (movable part) 202, radially external, movable in both radial directions relative to said parts 207 and 204, owing to the yielding of the elastic means 201 interposed radially between parts 207 and 202.
  • the base portion 204 and the supporting structure 207 are made as a single piece.
  • the base structure 204 is joined to the radial rib 213 by an axial rib 241, dimensioned so as to leave a slot 240 that allow a relative movement of the internal cheeks 214 in respect of to the radial rib 213, equal at maximum to the opening of the slot 240.
  • This relative movement allows the compensation of volume tolerances on the sidewalls of tyre 5 by exploiting the elastic flexural yielding of the internal cheeks 214.
  • the crown portion (movable part) 202 is joined to the supporting structure 207 by means of the elastic means 201 and of pins 203, said pins 203 being provided with a threaded end 210 engaged in the crown portion 202, and with a head 206 that acts as upper stop for the crown portion 202 and balances the preload of the elastic means 201.
  • Said pins 203 allow controllable preloading of the elastic means 201 with the aid of the threaded end 210.
  • the profiles 208 that act both as guide for the elastic means 201, and as lower stop for the crown portion (movable part) 202, for the purpose of protecting said elastic means from excessive strains, are made in the supporting structure 207.
  • the inserts 205 act as "seal" for the compound of the green tyre 5 and, on mould closure, prevent the compound of the green tyre 5 from flowing into the clearance between the crown portion (movable part) 202 and the base portion 204, creating undesirable fins and/or seizing of the system.
  • the inserts 205 are of elastomeric material or similar, glued (for example with epoxy resins) both to the crown portion (movable part) 202, and to the base portion 204.
  • the inserts 205 when the crown portion (movable part) 202 is pushed towards lower levels, are deformed in shear, allowing the movement.
  • the inserts 205 can be used in a similar manner and position in the convex circumferential sector 125 as well.
  • the sector embodiment 225 is very simple and is easy to assemble, since the crown portion 202 can be laid gently from above onto the bed of springs 201 and the preload is applied by acting on the threaded pin 203.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Claims (12)

  1. Vorrichtung (10) zum - bei vorgegebenen Bedingungen von Temperatur und Druck - Ausformen und Vulkanisieren eines Reifens (5), der wenigstens teilweise roh ist und ein festgelegtes Volumen hat,
    wobei die Vorrichtung eine äußere Hülle und einen kollabierbaren inneren Träger sowie auch eine bewegliche Krone (2, 202) aufweist, die zwischen dem inneren Träger und der äußeren Hülle angeordnet ist und mit der äußeren Hülle einen Hohlraum (18) mit gesteuertem Volumen zum Ausformen und Vulkanisieren des Reifens (5) bildet, und
    wobei das Volumen des Hohlraums (18) dem Volumen des Reifens (5), den er enthält, so angepasst ist, dass der Ausformungsdruck innerhalb eines vorgegebenen Bereichs von Werten aufrechterhalten wird,
    dadurch gekennzeichnet, dass
    der innere Träger eine Toroidform hat und eine Vielzahl von konvexen Umfangssektoren (25) aufweist, von denen jeder einen Basisabschnitt (4, 204) hat,
    jedem konvexen Umfangssektor (25) ein Abschnitt der Krone (2, 202) unter Zwischenlage von elastischen Elementen (1, 101, 201) zugeordnet ist, die ihn elastisch bewegbar machen, und
    ein Abschnitt der Krone (2, 202) mit dem Basisabschnitt (4, 204) mittels wenigstens eines Stifts (203) verbunden ist, der mit einem Gewindeende (210) und mit einem Kopf (206) versehen ist, der als oberer Anschlag für den Kronenabschnitt (2, 202) wirkt und ein Vorspannen der elastischen Elemente in steuerbarer Weise ermöglicht.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jeder der Basisabschnitte (4, 204) radial innen dazu geeignet ist, die axial innere Fläche der Seitenwände des Reifens (5) zu begrenzen, wobei dem Basisabschnitt (4, 204) ein Abschnitt der Krone (2, 202) radial außen zugeordnet ist, der sich dazu eignet, die radial innere Fläche des Reifens (5) zu begrenzen, und wobei der Abschnitt der Krone (2, 202) in beiden radialen Richtungen bezüglich des Basisabschnitts (4, 204) bewegbar ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kronenabschnitt (2, 202) mit dem Basisabschnitt (4, 204) so verbunden ist, dass ihre gegenseitige Bewegung in der Radialrichtung möglich ist.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Kronenabschnitt (2, 202) mit wenigstens zwei Anschlägen versehen ist, die in Nuten des Basisabschnitts (4, 204) eingreifen, um den Kräften/die Kräfte infolge der Vorspannung der elastischen Elemente entgegen zu wirken/auszugleichen.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Kronenabschnitt (2, 202) ein radial äußeres Profil hat, das mit der Innenfläche der Krone des Reifens (5) übereinstimmt.
  6. Vorrichtung nach einem der Ansprühe 1, 4 oder 5, dadurch gekennzeichnet, dass in dem, Tragaufbau geeignete Profile ausgeführt werden, die sowohl als Führung für die elastischen Elemente als auch als unterer Anschlag für den Kronenabschnitt (2, 202) wirken.
  7. Vorrichtung nach Anspruch 1 oder nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die elastischen Elemente Scheibenfedern (1, 101, 201) sind.
  8. Vorrichtung nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass der Tragaufbau mit inneren Kästen so verbunden ist, dass seine Relativbewegung in der Axialrichtung möglich ist.
  9. Vorrichtung nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, dass an der Kontaktstelle zwischen zwei benachbarten Kronenabschnitten (2, 202) ein Einsatz aus elastomerem Material oder dergleichen an eine der zwei gegenüberliegenden Flächen der beiden benachbarten Kronenabschnitte (2, 202) angeklebt ist.
  10. Vorrichtung nach einem der Ansprüche 2 bis 9, dadurch gekennzeichnet, dass an der Kontaktstelle zwischen zwei benachbarten Basisabschnitten (4, 204) ein Einsatz aus elastomerem Material oder dergleichen an eine der zwei gegenüberliegenden Oberflächen der beiden benachbarten Basisabschnitte (4, 204) angeklebt ist.
  11. Verfahren zum Ausformen und Vulkanisieren eines Reifens mit den Schritten:
    a) Vorbereiten eines Rohreifens, der ein bestimmtes Volumen hat und aus vorgewählten elastomeren Materialien und Verstärkungselementen ausgebildet ist, auf einem kollabierbaren inneren toroidförmigen Träger, der eine bewegliche Krone (2, 202) und eine Vielzahl von konvexen Umfangsabschnitten (25) hat, wobei jeder der konvexen Sektoren einen Basisabschnitt (4, 204) aufweist, wobei jedem konvexen Umfangssektor (25) ein Abschnitt der Krone (2, 202) unter Zwischenlage von elastischen Elementen (1, 101, 201) zugeordnet ist, die ihn elastisch bewegbar machen,
    b) Positionieren des Rohreifens und des jeweiligen kollabierbaren toroidförmigen inneren Trägers in einer Vorrichtung (10), die eine äußere Hülle aufweist,
    c) Ausformen und Vulkanisieren des Reifens,
    d) Vorspannen der elastischen Elemente in steuerbarer Weise derart, dass der Ausformschritt und der Vulkanisierschritt in einem Hohlraum mit gesteuertem Volumen zwischen der beweglichen Krone (2, 202) und der äußeren Hülle ausgeführt werden, dessen Volumen zur Anpassung des Volumens des Rohreifens, den er enthält, so zu vergrößern oder zu verkleinern, dass das Volumen des Hohlraums immer gleich dem des Rohreifens ist.
  12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass es mit der Vorrichtung nach einem der Ansprüche 1 bis 10 ausgeführt wird.
EP02748672A 2001-04-30 2002-04-24 Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens Expired - Lifetime EP1409233B1 (de)

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Application Number Priority Date Filing Date Title
EP02748672A EP1409233B1 (de) 2001-04-30 2002-04-24 Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP01830282 2001-04-30
EP01830282 2001-04-30
US29888201P 2001-06-19 2001-06-19
US298882P 2001-06-19
PCT/EP2002/004488 WO2002087863A2 (en) 2001-04-30 2002-04-24 Apparatus and method for moulding and vulcanizing a tyre in controlled volume conditions
EP02748672A EP1409233B1 (de) 2001-04-30 2002-04-24 Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens

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EP1409233A2 EP1409233A2 (de) 2004-04-21
EP1409233B1 true EP1409233B1 (de) 2005-09-14

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EP (1) EP1409233B1 (de)
AT (1) ATE304444T1 (de)
AU (1) AU2002319146A1 (de)
BR (1) BR0209296A (de)
DE (1) DE60206178T2 (de)
WO (1) WO2002087863A2 (de)

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JP4500264B2 (ja) 2003-12-29 2010-07-14 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ タイヤの製造方法
ATE431241T1 (de) * 2003-12-29 2009-05-15 Pirelli Verfahren zur reifenherstellung
WO2020131378A1 (en) * 2018-12-20 2020-06-25 Compagnie Generale Des Etablissements Michelin Mold with volume compensation for spoke of non-pneumatic tire

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US1393998A (en) * 1919-11-20 1921-10-18 William H Fulton Manufacture of tires
US1366750A (en) * 1920-04-08 1921-01-25 Smith Fred Tire-casing core
FR2742377A1 (fr) * 1995-12-19 1997-06-20 Michelin & Cie Moule a noyau rigide pour bandes de roulement annulaires notamment destinees au rechapage de pneumatiques
PT983834E (pt) * 1998-09-03 2003-04-30 Michelin Rech Tech Molde para bandas de rodagem planas

Also Published As

Publication number Publication date
DE60206178T2 (de) 2006-06-29
WO2002087863A2 (en) 2002-11-07
ATE304444T1 (de) 2005-09-15
AU2002319146A1 (en) 2002-11-11
EP1409233A2 (de) 2004-04-21
DE60206178D1 (de) 2005-10-20
WO2002087863A3 (en) 2004-02-12
BR0209296A (pt) 2004-07-13

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